Thursday, October 18, 2007

Science/Pride of Race

There is really less than .001% difference in any of the races on a DNA level. Melanin in the skin, maybe some facial features. There are evolutionary adaptations that we get from early human ancestors. Melanin, what causes the skin to be darker when you get a tan, the colour skin that our pre-human ancestor had. Melanin protects for the suns light and UV rays. As groups of humans migrated further from the equator, there was less sunlight, not enough to make Vitamin E, the production of which is triggered by sunlight. So these smaller tribes evolve and adapt, the people with less melanin have a better chance of living long enough to reproduce. Then people migrated to Europe became lighter to survive, some moved to India, had to get darker again, more sun. It was relatively recently when the seas froze into glaciers, the sea level lowered, and the first humans came to the Americas. Now they had clothes though, so the sun was as much as a factor on them. As they moved further south, they got a little darker again, but not like the populations native to Africa.

Dominant features, such as the Asian eyelids, or tall skinny Africans, (all races have them), are merely due to the bottle neck effect. There was a large diverse group, then the ice age that lowered sea levels killed off most of the populations around the globe. So quickly that there wasn't time to adapt by passing genes down from one generation to the next. So what you are left with is just random features.

They may be adaptive for some reason or another, a lanky body in Africa would be a way to regulate body temperature, as opposed to a stocky body further North. Larger or smaller nostrils depending on the heat of the air affecting how thin the are is. Remember we were still chasing down food, being able to breathe well was important.

So really, it's no more than simple evolutionary biology. It's just genes. Not different enough to be different species. Still all people. Whether you are black or white, just depends on what set of chromosomes, or genes, your parents gave you, and grandparents gave them, 8 great grandparents them and so on. 16, 32, 64, 128, 256, 512. Ten generations back and you are talking about 512 different sets of chromosomes from 512 people. Who each have 512 from the last ten generations. It's like having blue eyes, hitchhikers thumb, a uni-brow, hairy feet. It's just more noticeable. Saying you are proud to be black or white is like saying you are proud that you have and innie belly button, or hairy feet.

If you want to be proud, be proud you raised good families, run a successful business, be proud of your talents. Be proud of your kids for what they do, your friends, you ancestors for what they did, not where they are from. Anyone can live in Ireland/Africa/Topeka. It only separates us to be proud of where you live, what race you are, or how hairy their toes are.

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